Carbon pack



Sept. 28, 1954 J sum- 2,690,343

CARBON PACK Filed Nov. 27, 1951 INVENTOR JESSE A. B. SMITH Patented Sept. 28, 1954 luluirso stares zearzsnr OFF-ICE CARBONIPAGK (Jesse 'A. B. "Smith, Stamford, Conn, .assignor ito ="Underwood Corporation, New 'ZYOl'k, "N. '1Y., :a

corporation :of Delaware Application November 2'7,1'95'1,"Serial'No. 258,391

2 Claims. (cram-e1) The present invention relates to that type of 1 device which has become known in the trade as a =carbon=pack. Carbon packs are used :with typewriters, billing machines and other manifolding devices designed for printing on continuous forms of either-the 'fanfold type or open web type. The

carbon packs are mounted oncrossbars between stitutes an improvement over .the carbon packs shown in the patent to Smith, No. -1,534-,550,issued December 11, 1920, the patent -.to McAlvin, No. 2,292,343, issued April 1'7, 1941, and the patent to Buckley, No. 2,431,729, issued August 10, 1944 It is an object of this invention to provide a carbon pack which is so simple in construction that the whole pack can be manufactured for only a little more than the cost of the carbon paper itself, and yet will require no special means for mounting it in a machine.

It is a further object of the invention to provide a carbon pack which is exceedingly thin or flat, so that when it is positioned between the plies of a fanfold form it may extend to a point near the folded edges of the form.

It is a still further object of the invention to provide a flat, light-weight carbon pack having provision for attachment to any one of a plurality of carbon-carrying blades of a fanfold machine wherein the carrying blades are positioned at varying distances from the writing line of the machine.

These and further objects, features and advantages will become more readily apparent as the description of the invention proceeds.

Referring now to the drawings:

Figure 1 is a perspective view of a carbon pack made in accordance with the present invention, the top sheet being unfolded in position for use,

Figure 2 is a side elevational view of the carbon pack shown in Figure 1, one used sheet having been removed from the pack and showin the pack mounted upon a supporting blade, and

Figure 3 is a side elevational view of a modifled form of pack.

Referring first to that form of the invention shown in Figures 1 and 2, it will be seen that the pack is made up of a plurality of elongated sheets of carbon paper II). Each sheet is zigzagged around fold lines H and I2 and has a free end 13 which may be grasped -to unfolda sheet from the pack and extend it forwardly into position =of-use,*as-indicated in FigureZ. The folded sheets *are stacked one on top of another to provide a pile and said sheets are secured together by a "lineof stitching l hor other suitable means. In

the form of the inventionshown in Figures 1 and -2,-'the topand bottom sheets *of the pile are extended a substantial distance beyond the lineof stitching l l, in a'tiirection away from their free ends, to thereby-provide-a means for attaching the packto asupportingbar [5 of a fanfold-or other manifol'ding machine. tended ends of the top and bottom sheet maybe secured togetherbya'line of stitchingl-G orother If desired, the exsuitablemeans.

In' order to make? the pack conveniently usable with the Underwood Fanfold machine which, as is well known, and is shown for example in the patent to Smith, No. 1,816,348, has its carbon supporting blades located at varying distances from the line of writing, suitable marking or score lines I! may be provided upon the extended end of the top sheet to indicate the proper position for folding the extension to attach the pack to the various holding blades. If a fairly heavy grade of paper is used in the pack it may be sufficient to extend the end of only one of the sheets beyond the line of stitching to provide a means for attaching the pack to the holding blade.

In order that the used sheets may be readily detached from the pack without affecting the other sheets, a line of weakness is provided closely adjacent to and parallel with the line of stitching 14, between said line of stitchin and the free end of the sheet. This line of weakness for tearing 01f the used sheets may conveniently take the form of a line of stitching I8. Thus, when one or more sheets have been taken from the pack, the remaining sheets will be held together by the line of stitching M.

It will be apparent that only that portion of a sheet extending outwardly from the free ends of the folded sheets can be employed for making copies and it is therefore contemplated, under certain circumstances, to carbonize, as indicated at I9, only that end of each sheet.

In the modified form of the invention shown in Figure 3, the sheets 10' are secured together by a line of stitching l4 and are provided with a line of weakness in the form of a line of stitching IB' corresponding to the stitching I8 of that form of the invention shown in Figures 1 and 2. In this form of the invention, the ends of all of the sheets l0 opposite the free ends [3' are extended rearwardly beyond the line of stitching [4' to provide a means for attaching the pack to the carrier blade [5. These extended ends of the sheets are secured together into a flat form by lines of stitching 20. These lines of stitching 20 may serve the purpose of the lines I! of the pack shown in Figures 1 and 2, that is, to indicate the position for folding the sheets for attachment to the various carrier blades or, if desired, the carrier blades may be slipped into the pockets formed by the lines of stitching 20, to thereby support the pack. If the blades are slipped into the pockets formed by the lines of stitching 20, it will probably not be necessary to use the clip 2| shown in Figure 2 to hold the pack in its proper positron.

It will be appreciated that the carbon pack of the present invention is extremely simple in construction, consisting only in a plurality of folded sheets stitched together along various lines as described above. Because of the absence of special binders, backers or covers, the present pack is appreciably thinner or flatter than the prior art devices and therefore is more readily usable with fanfold stationary because the pack can be slipped into the folds to a point closer to the folded edges of the stationery.

Having thus described the invention, what is claimed is:

1. A carbon supply pack adapted to be held on a bar between superposed strips of continuous form stationery, comprising: a plurality of elongated carbon sheets, each sheet being folded along an even number of transverse fold lines, said fold lines being so spaced longitudinally of the sheet as to divide the sheet into an even numbered plurality of equilengthed sections and one section considerably longer than the equilengthed sections, said plurality of folded sheets being stacked one upon another in such manner that the corresponding fold lines of the individual sheets are vertically aligned, means securing the long sections of said sheets together along a transverse line lying close to one of said fold lines, and means securing the long sections of said sheets together at the ends thereof.

2. A carbon supply pack adapted to be held on a bar between superposed strips of continuous form stationery, comprising: a plurality of elongated sheets, each sheet being folded along an even number of transverse fold lines, said fold lines being so spaced longitudinally of the sheet as to divide the sheet into an even numbered plurality of equilengthed sections and one section considerably longer than the equilengthed sections, said plurality of folded sheets being stacked one upon another in such manner that the corresponding fold lines of the individual sheets are vertically aligned, means securing the long sections of said sheets together along a transverse line lying close to one of said fold lines, means securing the long sections of said sheets together at the free ends thereof, the equilengthed sections of said sheets being carbonized and the long sections being uncarbonized over that area lying between the lines along which said sections are secured together.

References Cited in the file of this patent UNITED STATES PATENTS 

